-Sterling Armor®-
In the end, "all things being equal"
....may not be a valid statement.
| Frantz® Manufacturing proudly introduces
Sterling Armor® — the alternative to stainless steel. In a direct response to customer requests, Frantz engineers have developed a low carbon steel ball that has the best attributes of stainless steel. With surface hardness near 70Rc, Sterling Armor is not a plating. Using Frantz's patented* manufacturing process, and control of time, temperature and gaseous composition, a ball surface is created that has higher scuff and wear resistance than 300 stainless. |
Tested for over 1200 hours in salt fog, Sterling Armor just keeps on rolling — which makes Sterling Armor ideal in caustic environments. With a wide variety of sizes available, Sterling Armor has almost endless applications. Corrosion resistance, magnetic, "no pit" or even aesthetic (Sterling Armor results in a pleasing gloss black finish), Sterling Armor is the solution. Best of all, Sterling Armor offers a price advantage over stainless steel balls — we dare say a significant advantage. Call us for a quote on your application. We think you'll be delighted.
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Corrosion Resistance Properties (Typical)
| Ball Material |
Hydraulic
Oils (Petroleum) |
Fresh Water |
Salt Water |
Alcohol | HCL-40% | Sulfuric Acid- 40% |
Phosphoric Acid- 40% |
Nitric Acid- 50% |
Citric Acid |
Ammonia |
| 52100 Chrome | E | P | -- | -- | -- | -- | -- | -- | F | G |
| 440C Stainless | -- | -- | -- | E | P | P | E | E | E | E |
| 302 Stainless | E | E | -- | -- | -- | -- | E | -- | -- | -- |
| 316 Stainless | E | E | E | E | P | P | E | E | E | E |
| Sterling Armor® | E | E | E | E | -- | -- | -- | -- | -- | E |
E = Excellent • G = Good • F = Fair • P = Poor • -- = Will not withstand conditions
Grades and Tolerances - Inches (Typical)
Grade |
Size Range in Inches |
Deviation from Spherical Form in Inches |
Lot Diameter Variation in Inches |
Maximum Surface Roughness* in Micro-inches "Ra" |
| 400 | 1/8" - 1" | .0004 | ± .0004 | 8.0 |
| 500 | 1/8" - 1" | .0005 | ± .0005 | 8.0 |
| 1000 | 1/8" - 1" | .001 | ± .001 | 10.0 |
| 2000 | 1/8" - 1" | .002 | ± .002 | 12.0 |
Grades and Tolerances - Metric (Typical)
Grade |
Size Range in Millimeters |
Deviation from Spherical Form in Millimeters |
Lot Diameter Variation in Millimeters |
Maximum Surface Roughness* in Micro-meters "Ra" |
| 400 | 4 - 25.4 | .0102 | ± .0102 | .203 |
| 500 | 4 - 25.4 | .0127 | ± .0127 | .203 |
| 1000 | 4 - 25.4 | .025 | ± .025 | .254 |
| 2000 | 4 - 25.4 | .051 | ± .051 | .305 |
* Maximum surface roughness visual comparison
| Properties - The Frantz® Sterling Armor® Process is a patented manufacturing process that controls time, temperature and gaseous composition creating a surface with superior scuff and wear resistance. Sterling Armor provides a complete and uniform barrier, imparting a tough, hard diffusion layer capable of withstanding thousands of hours in salt fog testing. | Load
Bearing Sterling Armor® - This process is designed
for light-loading applications such as light roller conveyors, polymer bearing
applications, and applications involving abrasion or wear characteristics. Non-load Sterling Armor® - This process is well-suited for inertia type systems, such as inertia shut-off switches, seat belt inertia systems, etc. This may also be used for polymer-bearing applications if loading allows.
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